Super Bowl LVI winner, in brief

LARAM

Think of the 2022 NFL champs whose name starts with "R" and ends with an "M."

This clue refers to the team that won Super Bowl LVI, which was the Los Angeles Rams. "In brief" signals that the answer is an abbreviation, so instead of the full team name, you use "LARAM" (a common short form for the Rams in crosswords). The Roman numeral LVI stands for 56, marking the 2022 game where they beat the Cincinnati Bengals.